3 in. x 6 ft. Backer ROD, Closed Cell, Carton/102 ft. East Coast WH - 3 inch Diameter Closed Cell Polyethylene Foam Backer Rod. 6 feet/Piece. 17 Pieces/Carton, 102 feet/Carton (31 meters). Price/Carton. (ships from our EAST Coast Warehouse; shipping leadtime 2 business days; UPS shipping only)
3 in. x 6 ft. Backer ROD, Closed Cell, Carton/102 ft. East Coast WH
$192.00 SALE $146.99
(Savings: $45.01)
 Buy 10 or more and pay $109.44 each (save 43.00%) 
  Order Options:  
  Add To Cart  
  Add To Saved Cart  


3 inch Diameter Closed Cell Polyethylene Foam Backer Rod. 6' / Piece. 17 Pieces/Carton, 102 ft./Carton (31 meters). Price/Carton.

Ordering Notes:

  • Ships from our EAST Coast Warehouse; (select Backer-Rod-300-CC for lower cost WEST area shipments).
  • Shipping Leadtime 2 business days.
  • UPS Shipping only.
  • Color is generally light to medium gray, and NOT selectable.


Round, firm, resilient, closed-celled polyethylene foam with a water resistant outer skin. Provides controlled depth for sealants. Does not stick to sealants. Exceeds ASTM standards for bond breaker materials. No added bond breaker is required. Very high moisture resistance. Will not absorb ground water. Compatible with all known types of sealants including butyl, polyurethane, silicones, tri-polyimer, polysulfide, acrylic, etc. (except Hot-Pour sealants).


  • High moisture environments
  • Glazing
  • Ground based expansion joints
  • General purpose sealant backing
  • Window Glazing
  • Concrete cut joints
  • Highway joints and relief cuts, wire embedding cuts.
  • Parking garages
  • Around perimeters of door and window frames,
  • Coping and glazing joints
  • Log Home chinking
  • Isolation joints


Select a backer-rod diameter that is approximately 25% larger than the width of the joint. Small backer rod compresses easier (25-60%).



Email us at sales@bestmaterials.com or
Call us at 1-800-474-7570 or 602-272-8128
You'll get a prompt reply!

similar product terms: 3 inch backer rod, backer rod, 3 inch closed cell backer rod, 3 inch chinking, caulk backing, 3 sealant backing, 3 sealant support, caulk support, 3 closed cell rod, closed celled foam, 3 closed celled backer rod, ITP backer rod, RB58 backer rod, mile high foam

  Associated Items:  
3 Inch Backer Rod, Closed Cell (6 ft. Piece)
3 INCH DIAMETER POLY BACKER ROD, CLOSED CELL, NON-STICK SKIN, 6-FOOT LENGTH/PIECE (actual length about 69 inches). PRICE/PIECE. (color could be white, gray or charcoal and is not selectable).
$12.00 $8.99
Quantity:     Add to Cart

A CSG Group Company

Shop with
Peace of Mind!